more robust in resource shortage situations, basically identical to
code I added to the "ahc" driver some time ago.
Thanks to Brad Spencer for the testing help.
(currently only CD-ROM drives on i386). The sys/dev/scsipi system provides 2
busses to which devices can attach (scsibus and atapibus). This needed to
change some include files and structure names in the low level scsi drivers.
bit from the extended setup inquiry and key off it to:
- Force synchronous negotiation on targs > 7.
- Read additional information returned by wide cards on inquire setup.
- Read sync period on targs > 7.
- Display sync period/offset on targs > 7.
- Set scsi_link.max_target to 15.
cvs: ----------------------------------------------------------------------
ISA-compatible port space of PCI buslogic cards.
* Add call to bha_pci.c to disable the ISA-compatible ports of a PCI
device. The ISA-compatible ports are enabled by default, which
causes the card to be autoconfigured a second time as an ISA device,
which appears to deadlock the card.
* Change bha_cmd() to return the number of bytes it actually received
in response to a command, or -1 on error.
* Use heuristics (checking for bha-only registers, and checking the size
of the response to BHA_INQURE_EXTENDED) to bha_find, to make sure the
bha driver never matches an aha (Adaptec 1542 or compatible) device.
A single kernel should now boot on either Adaptec or BusLogic controllers,
provided we always probe for BusLogic devices before Adaptec devices,
but this has not yet been verified.
- No more distinction between i/o-mapped and memory-mapped
devices. It's all "bus space" now, and space tags
differentiate the space with finer grain than the
bus chipset tag.
- Add memory barrier methods.
- Implement space alloc/free methods.
- Implement region read/write methods (like memcpy to/from
bus space).
This interface provides a better abstraction for dealing with
machine-independent chipset drivers.
thorpej